dedecms v5.7.87 has a command execution vulnerability
The SQL statement at this point is executed when the program is uninstalled
SQL statements are executed during uninstallation
Here the uninstallok branch will be executed, and next we will get the SQL statement we entered
Here you get the contents of the file via GetSystemFile()
In this method GetModuleInfo() passes two arguments to locate the file
The file is finally located by unloading the routing hash value of the function point
Find the file by hash
Then find the xml and view the xml contents
The delsql field is found in the xml and decoded through base64 to obtain the content of our custom SQL file.
Then we unload
The log file is then generated in the corresponding directory
Then we find a function point to generate what we want in the log file
Visit cyw.php
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